いつか
sometime; someday; one day; some time or other; the other day; in due course; in time
You will succeed some day.
・what
・time
・hour
いつかしら
before one knows;before one becomes aware of;unnoticed;unawares
いつかは
sooner or later;in due time;in due course
いつから
since when;from when;how long
なんじから
from what time
いつからか
since some time or another;since who-knows-when